Russian President Vladimir Putin arrived in Japan Thursday for a summit with Prime Minister Shinzo Abe at a hot spring resort, where they will seek progress on a territorial row that has blocked a peace treaty formally ending World War II.

The two sides are likely to clinch agreements on economic cooperation in areas from medical technology to energy. But both have sought to dampen expectations of a breakthrough in the feud over the windswept islands in the western Pacific seized by Soviet forces at the end of the war, forcing some 17,000 Japanese residents to flee.

Putin, who arrived nearly three hours behind schedule, and Abe will meet Thursday at a mountainside inn at the hot spring resort of Nagato in Abe's home constituency in southwest Japan, and again in Tokyo Friday.

Police wearing riot gear dotted the streets in Nagato. One banner, showing a drawing of Putin and Abe shaking hands, welcomed their meeting as "A new start, from Nagato."

Diplomatic legacy

Abe has pledged to resolve the territorial dispute, in hopes of leaving a diplomatic legacy that eluded his foreign minister father, and of building better ties with Russia to counter a rising China.

“I want to negotiate as the representative of Japan with the keen feelings of the former residents of the islands engraved in my heart,” Abe told reporters before leaving Tokyo.

But a deal to end the dispute over the islands, known in Japan as the Northern Territories and in Russia as the Southern Kuriles, carries risks for Putin, who does not want to tarnish his image at home of a staunch defender of Russian sovereignty.

"The hurdles that remain to be cleared are still quite high," Yasutoshi Nishimura, an adviser to Abe, told Reuters. "On the other hand, they are two strong leaders, so I hope that some broad path forward and direction will emerge."

Russia wants sanctions dropped

Russia hopes to cement deals with Japanese companies as part of an Asian pivot in response to a decision by Western governments, including Japan, to impose sanctions in 2014 over Russia’s role in the Ukraine conflict.

Putin told the Yomiuri newspaper this week that the goal of a peace treaty would be harder to achieve if Russia remained subject to Japanese sanctions.

But Japan’s trade minister, Hiroshige Seko, has ruled out any economic cooperation with Russia that would undermine Group of Seven unity on the sanctions.

Japan has long insisted that its sovereignty over all four disputed islands off Japan’s northern island of Hokkaido must be confirmed before a peace treaty is signed.

But there have been signs it has been rethinking its stance, perhaps by reviving a formula called "two-plus-alpha." It's based partly on a 1956 joint declaration in which the Soviet Union agreed it would hand over the two smaller islands after a peace treaty was signed.

Over the decades, the two sides have floated the idea of joint economic activity on the islands. How to do that without undercutting either side’s claim to sovereignty has never been resolved.